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National Pollutant Discharge Elimination System (NPDES)

Combined Sewer Overflows in the Great Lakes Basin


There are 152 NPDES permits which authorize discharges from combined sewer overflows (CSOs) to the Great Lakes Basin. Select the state in the right-side box for the list of CSO permits in the Great Lakes Basin in that state.

Map of CSOs in the Great Lakes Basin








 

Public Notification Requirements for the Great Lakes

Public Notification Requirements for Combined Sewer Overflows to the Great Lakes Basin - On January 8, 2018, EPA published the final Public Notification Requirements for Combined Sewer Overflows to the Great Lakes.

Reports to Congress

Report to Congress: Combined Sewer Overflows into the Great Lakes Basin (2016) - This report presents EPA’s assessment of the implementation status of long-term CSO control plans (LTCPs) in the Great Lakes Basin. The report includes a summary of existing information on the occurrence and volume of discharges from CSOs in the Great Lakes Basin during 2014.

Report to Congress: Combined Sewer Overflows to the Lake Michigan Basin (2007) - This report assesses the occurrence of CSOs in the Lake Michigan drainage basin. The report identifies EPA actions to ensure that state permitting and enforcement efforts are consistent with the national CSO control policy and Clean Water Act, and lead to further reduction in CSO discharges to Lake Michigan.

Great Lakes National Program Office

The Great Lakes National Program Office (GLNPO) coordinates U.S. efforts with Canada under the Great Lakes Water Quality Agreement (GLWQA) to restore and maintain the chemical, physical, and biological integrity of the Great Lakes Basin Ecosystem, which includes Lakes Superior, Michigan, Huron, Erie, and Ontario.

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